Infertility is a term best used to classify people who are unable to conceive after a year of unprotected sex. The problem is common, affecting about 15 percent of couples trying to get pregnant.

In one-third of the cases, infertility is attributed to the male in a relationship; the woman is found to be the cause in another one-third; and both partners (or unknown causes) make up the remaining third. One factor is certain, though: Optimizing fertility in men can increase the chance to conceive naturally.

Use one or more of the following 12 suggestions to help increase your fertility:

1. Maintain a healthy weight

Being overweight reduces the chances of conceiving for both men and women. To maintain a desirable weight and increase fertility, eat a healthy diet. Consume plenty of fruits, vegetables, whole grains, protein, dairy foods and heart-healthy fats. Minimize